399262444 has 12 divisors (see below), whose sum is σ = 798524944. Its totient is φ = 171112464.

The previous prime is 399262433. The next prime is 399262463. The reversal of 399262444 is 444262993.

It is a happy number.

399262444 is an admirable number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 399262444.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7129659 + ... + 7129714.

Almost surely, 2^399262444 is an apocalyptic number.

It is an amenable number.

399262444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399262444 is a wasteful number, since it uses less digits than its factorization.

399262444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14259384 (or 14259382 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The square root of 399262444 is about 19981.5525923288. The cubic root of 399262444 is about 736.3531578433.

The spelling of 399262444 in words is "three hundred ninety-nine million, two hundred sixty-two thousand, four hundred forty-four".